Vui lòng dùng định danh này để trích dẫn hoặc liên kết đến tài liệu này: http://thuvienso.vanlanguni.edu.vn/handle/Vanlang_TV/15429
Nhan đề: Analysis of the Compressibility Effect of Overburden in a Deep Shield Tunnel Based on the Effect of the Pressure Arch
Tác giả: Lei, Ping
Han, Xin
Ye, Fei
Liang, Xing
He, Biao
Duan, Zhi-jun
Từ khoá: Pressure effects
Subway tunnels
Soil investigations
Construction
Stress concentration
Soil properties
Subway construction
Tunnel construction
Segments
Soil compressibility
Năm xuất bản: 2019
Nhà xuất bản: Hindawi Publishing Corporation
Tóm tắt: With the continuous improvement of the planning system for urban subway construction, shield tunnels are being more frequently constructed, and thus, the floating problem of shield tunnels in construction has been paid increasingly more attention. In view of this, in this paper, with the combination of numerical simulation and theoretical analysis, the problem of floating segments compressing the overburden in the deep shield tunnel is discussed. The influential factors of the pressure arch effect are analysed using numerical simulation, the compressive displacement of soil in the plastic zone is investigated in a focused manner based on the pressure arch effect, and the problem of floating segments that the Mindlin solution is applied to under the actions of distributed force and concentrated force is solved. The results show the following: (1) the displacement of the segment is composed of the shield tail gap, the compressive displacement of the soil, and the translational displacement of the soil; (2) the intensity of the pressure arch effect is interactively influenced by the thickness-diameter ratio and the soil properties; (3) the compressive displacement of the soil mass accounts for a larger proportion of floating segment-induced displacements; and (4) the perturbation influence calculation formula of the surrounding strata and the building structure is obtained based on the Mindlin solution.
Định danh: http://thuvienso.vanlanguni.edu.vn/handle/Vanlang_TV/15429
ISSN: 1687-8086
1687-8094 (e)
Bộ sưu tập: Xây dựng

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